CN110849014A - Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device - Google Patents
Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device Download PDFInfo
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- CN110849014A CN110849014A CN201910989049.7A CN201910989049A CN110849014A CN 110849014 A CN110849014 A CN 110849014A CN 201910989049 A CN201910989049 A CN 201910989049A CN 110849014 A CN110849014 A CN 110849014A
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- carbon dioxide
- energy recovery
- permanent magnet
- recovery system
- energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses an energy recovery system of a MW-level transcritical carbon dioxide cold and heat combined supply device, belonging to the technical field of carbon dioxide cold and heat combined supply devices, and being applied to a carbon dioxide cold and heat combined supply system, wherein the carbon dioxide cold and heat combined supply system comprises a pressure reducer and a heat regenerator, the energy recovery system is arranged between the pressure reducer and the heat regenerator, and comprises a permanent magnet motor connected with the front end of the pressure reducer, the energy recovery system is arranged behind the heat regenerator and in front of the pressure reducer, a multi-stage fully-closed permanent magnet motor recovery unit is adopted, so that the problem of carbon dioxide leakage in the energy recovery process is solved, the energy loss in the pressure reduction process is fully and efficiently recovered, and meanwhile, the fluctuation of the recovered energy is fully absorbed by a rapid energy storage module, a lithium iron phosphate battery pack and a grid-connected inverter, so that the dynamic automatic, and the power is connected with an input mains line in a grid mode, and efficient automatic regulation and distribution are achieved.
Description
Technical Field
The invention belongs to the technical field of carbon dioxide cold and heat cogeneration devices, and particularly relates to an energy recovery system of a MW-level transcritical carbon dioxide cold and heat cogeneration device.
Background
In a MW-level large-scale transcritical carbon dioxide system, a pressure reduction part utilizes a special pressure reducer for pressure reduction, but in the process, energy loss caused by pressure reduction cannot be recovered, and due to the characteristics of high pressure, easiness in leakage and oil-containing carbon dioxide, an expansion machine cannot be used for recovering energy, so that energy loss is caused.
Disclosure of Invention
The invention provides an energy recovery system of a MW-grade transcritical carbon dioxide cold and heat cogeneration device, which has the characteristic of improving the energy recovery efficiency to the maximum extent by adopting a multi-stage energy recovery module.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a MW level transcritical carbon dioxide cold and hot antithetical couplet supplies device energy recovery system, is applied to carbon dioxide cold and hot antithetical couplet and supplies the system, and this carbon dioxide cold and hot antithetical couplet supplies the system and includes pressure reducer and regenerator, and energy recovery system sets up between pressure reducer and regenerator, energy recovery system includes the permanent magnet motor of being connected with the pressure reducer front end, the permanent magnet motor is provided with multiunit and series connection, the foremost of permanent magnet motor is connected with the regenerator, permanent magnet motor current output end all is connected to the input of quick energy storage module, the output of quick energy storage module is connected to the input of lithium iron phosphate group, the output of lithium iron phosphate group is connected with the input of grid-connected inverter, grid-connected inverter's output is connected to compressor unit.
Preferably, the permanent magnet motor comprises a rotor and a stator, the rotor is a permanent magnet and is arranged inside the stator, the stator is a coil, and the rotor and the stator are totally enclosed.
Preferably, the compressor unit comprises at least five CO2 compressors connected in parallel.
Compared with the prior art, the invention has the beneficial effects that:
the invention is arranged in front of a pressure reducer behind a heat regenerator, adopts a multi-stage fully-closed permanent magnet motor recovery unit, solves the problem of carbon dioxide leakage in the energy recovery process, fully and efficiently recovers energy loss in the pressure reduction process, and simultaneously enables the fluctuation of the recovered energy to be fully absorbed by the rapid energy storage module through the rapid energy storage module, the lithium iron phosphate battery pack and the grid-connected inverter, thereby realizing the dynamic automatic matching and adjustment of the recovered energy and the input energy, realizing the grid connection with an input commercial power line, and realizing the efficient automatic adjustment and distribution.
Drawings
Fig. 1 is a schematic structural diagram of an energy recovery system of a MW-grade transcritical carbon dioxide combined cooling and heating device according to the present invention.
Fig. 2 is a schematic structural diagram of a permanent magnet motor according to the present invention.
Fig. 3 is a schematic structural view of the rotor of the present invention.
Fig. 4 is a schematic structural view of the stator of the present invention.
In the figure: 1. a compressor unit; 2. a grid-connected inverter; 3. a lithium iron phosphate battery pack; 4. a fast energy storage module; 5. a pressure reducer; 6. a permanent magnet motor; 61. a rotor; 62. a stator; 7. a regenerator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: an energy recovery system of a MW-level transcritical carbon dioxide cold and heat combined supply device is applied to a carbon dioxide cold and heat combined supply system, the carbon dioxide cold and heat combined supply system comprises a pressure reducer 5 and a heat regenerator 7, the energy recovery system is arranged between the pressure reducer 5 and the heat regenerator 7, the energy recovery system comprises a permanent magnet motor 6 connected with the front end of the pressure reducer 5, the permanent magnet motor 6 comprises a rotor 61 and a stator 62, the rotor 61 is a permanent magnet and is arranged inside the stator 62, the stator 62 is a coil, the rotor 61 and the stator 62 are totally enclosed, the permanent magnet motor 6 is provided with a plurality of groups and connected in series, the permanent magnet motor 6 is a multi-level energy recovery module, the energy recovery efficiency is improved to the maximum extent, the frontmost end of the permanent magnet motor 6 is connected with the heat regenerator 7, the current output end of the permanent, the output end of the rapid energy storage module 4 is connected to the input end of the lithium iron phosphate battery pack 3, the output end of the lithium iron phosphate battery pack 3 is connected with the input end of the grid-connected inverter 2, the output end of the grid-connected inverter 2 is connected to the input end of the compressor unit 1 to supply electric energy to the compressor unit 1, the compressor unit 1 comprises at least five CO2 compressors which are connected in parallel, a coil and a permanent magnet are totally enclosed, and can prevent carbon dioxide from leaking in operation, so as to solve the problem of carbon dioxide leakage in the process of recovering energy, the leakage risk in long-term operation is controlled within 10PPM, the carbon dioxide in a flowing gas-liquid mixed state is utilized to drive a rotor 61 in a permanent magnet motor 6, current is generated in the coil and is output to a peripheral rapid energy storage module 4, the fluctuation of the recovered energy is fully absorbed by the rapid energy storage module 4, and then the rapid energy storage, the system is used for the compressor unit 1, and the grid-connected inverter 2 ensures the dynamic automatic matching and adjustment of the recovered energy and the input energy, and ensures the full and efficient utilization of the recovered energy.
The carbon dioxide combined cooling and heating system further comprises an air cooler, an evaporator, a DCS control cabinet and other mechanisms, wherein the input end of the DCS control cabinet is electrically connected with each group of CO2 compressors in the compressor unit 1 respectively.
The current load of the rapid power storage module is calculated, the capacity of the lithium iron phosphate battery is calculated, and the fluctuation of the recovered energy is fully absorbed by the rapid energy storage module 4:
fast power storage module current load calculation
I＝N*P*0.8/V/η/1.732
N number of compressors
P: compressor power
0.8: coefficient of energy loss (Experimental test)
V is voltage
η power factor
1.732: three phase current conversion factor
Fast ferric phosphate lithium battery capacity calculation in a storage module
C＝V*I*η*1.732*0.5h
C is battery capacity
I fast energy storage module current
V is voltage
η power factor
1.732: three phase current conversion factor
0.5 h: fast storage module buffer time
The working principle and the using process of the invention are as follows: according to the invention, a pressure reducer 5 is arranged behind a heat regenerator 7 and in front of the heat regenerator, carbon dioxide drives a fully-enclosed power generation module permanent magnet motor 6, a multi-stage module is adopted for series connection, high-pressure carbon dioxide is changed into low-pressure carbon dioxide, pressure difference energy is converted into electric energy, the fluctuation of the recovered energy is fully absorbed by a rapid energy storage module 4 through a rapid electric storage module 4, the electric energy is stored in a lithium iron phosphate battery pack 3, and the electric energy is inverted and then is connected with a power supply line of a compressor unit 1 in a grid mode, so that.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a MW level transcritical carbon dioxide is cold and hot to be supplied device energy recovery system, is applied to the cold and hot antithetical couplet of carbon dioxide and supplies in the system, and this cold and hot antithetical couplet of carbon dioxide supplies the system to include pressure reducer (5) and regenerator (7), and energy recovery system sets up between pressure reducer (5) and regenerator (7), its characterized in that: the energy recovery system comprises a permanent magnet motor (6) connected with the front end of a pressure reducer (5), the permanent magnet motor (6) is provided with a plurality of groups and is connected in series, the foremost end of the permanent magnet motor (6) is connected with a heat regenerator (7), the current output end of the permanent magnet motor (6) is connected to the input end of a quick energy storage module (4), the output end of the quick energy storage module (4) is connected to the input end of a lithium iron phosphate battery pack (3), the output end of the lithium iron phosphate battery pack (3) is connected with the input end of a grid-connected inverter (2), the output end of the grid-connected inverter (2) is connected to the input end of a compressor unit (1), and electric energy is supplied to the compressor unit (1.
2. The energy recovery system of the MW-grade transcritical carbon dioxide combined heat and cold supply device according to claim 1, wherein: the permanent magnet motor (6) comprises a rotor (61) and a stator (62), wherein the rotor (61) is a permanent magnet and is arranged inside the stator (62), the stator (62) is a coil, and the rotor (61) and the stator (62) are totally enclosed.
3. The energy recovery system of the MW-grade transcritical carbon dioxide combined heat and cold supply device according to claim 1, wherein: the compressor unit (1) comprises at least five CO2 compressors which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910989049.7A CN110849014A (en) | 2019-10-17 | 2019-10-17 | Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device |
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| CN201910989049.7A CN110849014A (en) | 2019-10-17 | 2019-10-17 | Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device |
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| CN110849014A true CN110849014A (en) | 2020-02-28 |
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| CN105371516A (en) * | 2015-08-31 | 2016-03-02 | 黑龙江爱科德科技有限公司 | Carbon dioxide two-stage cold and heat co-generation system |
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| CN109631379A (en) * | 2018-11-26 | 2019-04-16 | 安徽正刚新能源科技有限公司 | A kind of 500/600KW-5000/6000KW heat and cold supplier |
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2019
- 2019-10-17 CN CN201910989049.7A patent/CN110849014A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172336A (en) * | 2003-12-10 | 2005-06-30 | Kansai Electric Power Co Inc:The | Natural refrigerant heat pump system |
| CN101033895A (en) * | 2004-11-04 | 2007-09-12 | 松下电器产业株式会社 | Control method of refrigeration cycle apparatus |
| CN100516712C (en) * | 2004-11-04 | 2009-07-22 | 松下电器产业株式会社 | Control method of refrigeration cycle apparatus |
| US20100000712A1 (en) * | 2008-07-07 | 2010-01-07 | Alden Ray M | Air or water extracted fluid split cycle heat pump |
| CN103983036A (en) * | 2014-05-30 | 2014-08-13 | 西安交通大学 | CO2 circulation poly-generation system for waste heat recovery of internal combustion engine |
| WO2016126300A2 (en) * | 2014-11-26 | 2016-08-11 | General Electric Company | Electrothermal energy storage system and an associated method thereof |
| CN105371516A (en) * | 2015-08-31 | 2016-03-02 | 黑龙江爱科德科技有限公司 | Carbon dioxide two-stage cold and heat co-generation system |
| CN105698432A (en) * | 2016-01-21 | 2016-06-22 | 天津大学 | Multi-functional-mode CO2 refrigeration and power generation combined circulating system and mode switching control method |
| CN108506110A (en) * | 2018-02-28 | 2018-09-07 | 山东大学 | A kind of cooling heating and power generation system |
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